+static_always_inline int
+ethernet_frame_is_tagged (u16 type)
+{
+#if __SSE4_2__
+ const __m128i ethertype_mask = _mm_set_epi16 (ETHERNET_TYPE_VLAN,
+ ETHERNET_TYPE_DOT1AD,
+ ETHERNET_TYPE_VLAN_9100,
+ ETHERNET_TYPE_VLAN_9200,
+ /* duplicate last one to
+ fill register */
+ ETHERNET_TYPE_VLAN_9200,
+ ETHERNET_TYPE_VLAN_9200,
+ ETHERNET_TYPE_VLAN_9200,
+ ETHERNET_TYPE_VLAN_9200);
+
+ __m128i r = _mm_set1_epi16 (type);
+ r = _mm_cmpeq_epi16 (ethertype_mask, r);
+ return !_mm_test_all_zeros (r, r);
+#else
+ if ((type == ETHERNET_TYPE_VLAN) ||
+ (type == ETHERNET_TYPE_DOT1AD) ||
+ (type == ETHERNET_TYPE_VLAN_9100) || (type == ETHERNET_TYPE_VLAN_9200))
+ return 1;
+#endif
+ return 0;
+}
+